1Made of silicone material, super soft and ductile, easy to wrap and perfect fit, durable. 2The product has good elasticity, strong tensile resistance, waterproof and wearresistant. 3High 20mm/0.8in, diameter 30mm/1.2in, suitable for 25.4mm/1.0in and 31.8mm/1.3in can be used. 4Simple design, light and compact, easy to carry and use, convenient and practical. 5Compact shape, does not take up space, suitable for road bicycles, bicycles.